name: gofmt
on:
  push:
    branches:
      - master
  pull_request:
    paths:
      - '.github/workflows/gofmt.yml'
      - '**.go'
jobs:

  gofmt:
    name: Run gofmt
    runs-on: ubuntu-latest
    steps:

    - name: Set up Go 1.15
      uses: actions/setup-go@v1
      with:
        go-version: 1.15
      id: go

    - name: Check out code into the Go module directory
      uses: actions/checkout@v1

    - uses: actions/cache@v1
      with:
        path: ~/go/pkg/mod
        key: ${{ runner.os }}-gofmt-${{ hashFiles('**/go.sum') }}
        restore-keys: |
          ${{ runner.os }}-gofmt-

    - name: Install goimports
      run: |
        go get golang.org/x/tools/cmd/goimports
        go build golang.org/x/tools/cmd/goimports

    - name: gofmt
      run: |
        if [ "$(find . -iname '*.go' | grep -v '\.pb\.go$' | xargs ./goimports -l)" ]
        then
          find . -iname '*.go' | grep -v '\.pb\.go$' | xargs ./goimports -d
          exit 1
        fi